2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1993, David Greenman
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #ifndef _SYS_IMGACT_H_
35 #define _SYS_IMGACT_H_
41 #define MAXSHELLCMDLEN PAGE_SIZE
46 char *buf; /* pointer to string buffer */
47 void *bufkva; /* cookie for string buffer KVA */
48 char *begin_argv; /* beginning of argv in buf */
49 char *begin_envv; /* (interal use only) beginning of envv in buf,
50 * access with exec_args_get_begin_envv(). */
51 char *endp; /* current `end' pointer of arg & env strings */
52 char *fname; /* pointer to filename of executable (system space) */
53 char *fname_buf; /* pointer to optional malloc(M_TEMP) buffer */
54 int stringspace; /* space left in arg & env buffer */
55 int argc; /* count of argument strings */
56 int envc; /* count of environment strings */
57 int fd; /* file descriptor of the executable */
58 struct filedesc *fdp; /* new file descriptor table */
62 struct proc *proc; /* our process struct */
63 struct label *execlabel; /* optional exec label */
64 struct vnode *vp; /* pointer to vnode of file to exec */
65 struct vm_object *object; /* The vm object for this vp */
66 struct vattr *attr; /* attributes of file */
67 const char *image_header; /* head of file to exec */
68 unsigned long entry_addr; /* entry address of target executable */
69 unsigned long reloc_base; /* load address of image */
70 char vmspace_destroyed; /* flag - we've blown away original vm space */
71 #define IMGACT_SHELL 0x1
72 #define IMGACT_BINMISC 0x2
73 unsigned char interpreted; /* mask of interpreters that have run */
74 char opened; /* flag - we have opened executable vnode */
75 char *interpreter_name; /* name of the interpreter */
76 void *auxargs; /* ELF Auxinfo structure pointer */
77 struct sf_buf *firstpage; /* first page that we mapped */
78 unsigned long ps_strings; /* PS_STRINGS for BSD/OS binaries */
79 struct image_args *args; /* system call arguments */
80 struct sysentvec *sysent; /* system entry vector */
82 unsigned long execpathp;
86 unsigned long pagesizes;
90 struct ucred *newcred; /* new credentials if changing */
91 bool credential_setid; /* true if becoming setid */
101 int exec_alloc_args(struct image_args *);
102 int exec_args_add_arg(struct image_args *args, const char *argp,
103 enum uio_seg segflg);
104 int exec_args_add_env(struct image_args *args, const char *envp,
105 enum uio_seg segflg);
106 int exec_args_add_fname(struct image_args *args, const char *fname,
107 enum uio_seg segflg);
108 int exec_args_adjust_args(struct image_args *args, size_t consume,
110 char *exec_args_get_begin_envv(struct image_args *args);
111 int exec_check_permissions(struct image_params *);
112 register_t *exec_copyout_strings(struct image_params *);
113 void exec_free_args(struct image_args *);
114 int exec_new_vmspace(struct image_params *, struct sysentvec *);
115 void exec_setregs(struct thread *, struct image_params *, u_long);
116 int exec_shell_imgact(struct image_params *);
117 int exec_copyin_args(struct image_args *, const char *, enum uio_seg,
119 int exec_copyin_data_fds(struct thread *, struct image_args *, const void *,
120 size_t, const int *, size_t);
121 int pre_execve(struct thread *td, struct vmspace **oldvmspace);
122 void post_execve(struct thread *td, int error, struct vmspace *oldvmspace);
125 #endif /* !_SYS_IMGACT_H_ */